Twisting frame

ABSTRACT

A twisting frame is provided with a covering duct which covers a running second covering duct which covers a twisting unit provided with a twisting spindle, a main duct which is arranged on, and extends along the whole length of the frame, wherein the belt covering duct, said twisting unit covering duct and the main duct are connected to each other so that fly waste, heat and noise generated by the twisting operation may be delivered to the outside by an air stream which is induced by the running of said belt.

United States Patent [191 Nakahara et al.

[451 Dec. 31, 1974 TWISTING FRAME [75] lnventors: Teiji Nakahara; MisaoUeda, both of Kyoto; Minoru Kuninaga, Nagoakakyo; Junichi Teranishi,Joyo, all of Japan [73] Assignee: Murata Kikai Kabushiki Kaisha,

Kyoto, Japan [22] Filed: Oct. 18, 1973 [21] Appl. No.: 407,621

[30] Foreign Application Priority Data Oct. 25, 1972 Japan 47-l07393Feb. 16, 1973 Japan 48-19512 Feb. 22, 1973 Japan 48-21855 [52] US. Cl.57/56 [51] Int. Cl ....'D01h 11/00 [58] Field of Search 57/34 R, 1 R,56, 57, 92,

[56] References Cited UNITED STATES PATENTS 2,128,207 8/1938 Hodge 57/562,425,577 8/1947 Thoma. 57/56 2,976,668 3/1961 Reiterer... 57/563,086,348 4/1963 Fowler et 57/56 3,115,000 12/1963 Naegeli 57/56 PrimaryExaminer-Donald Watkins [57] ABSTRACT A twisting frame is provided witha covering duct which covers a running second covering duct which coversa twisting unit provided with a twisting spindle, a main duct which isarranged on, and extends along the whole length of the frame, whereinthe belt covering duct, said twisting unit covering duct and the mainduct are connected to each other so that fly waste, heat and noisegenerated by the twisting operation may be delivered to the outside byan air stream which is induced by the running of said belt.

8 Claims, 13 Drawing Figures PATENTED I 3,857. 228

SHEET UBUF 10 PATENTEU W13 1 I974 3.857. 228

' sum D30F10 SHEE'I 05 0F 10 PATENTED DEBB 1 I974 Fig. 7

PATENTEDBEWW 3,857,228

' SHEEI UBUF 10 H ll LL PATENTEDUECIH I974 SHEET 07 [1F 10 Fig. /0

PATENTEDBEEWQM 3.857.228

sum user 10 PATENTED SE83] I974 SHEET 09 0F 10 Fig. 2

Pmmmw 1974 SHEET IOUF 10 Fig. /3

31 u iii---- side of said twisting frame. Also, such a twisting unitcomprises a spindle part and a winding up part for the twisted yarn. Ontwisting a yarn, said spindle is rotated by a common driving source,such as a tangential belt, which runs along said spindle row and isdriven by an electric motor at the end of the frame.

In this type of arrangement, when the twisting operation takes placebysaid twisting unit, some problems are inevitable, such as thegeneration of a disturbed air stream, irritating noise, and undesirableheat. Still another difficulty is the generation of fly waste in thespace surrounding said twisting unit. These conditions are undesirable.

In the conventional twisting frame, especially the two-for-one typewhich is not provided with a covering for the spindle driving apparatus,generation of a disturbed air stream about the spindle unit and alsoaround the running belt is caused by the high speed linear running ofthe tangentialbelt or the high speed ballooning of the yarn beingtwisted. In addition to this, generation of heat and noise in the ,areaof the driving apparatus for said spindle can occur. This generation ofheat affects not only surrounding air conditions but also workingconditions, in that the surrounding air temperature is.increased. As thesurrounding air temperature increases, the yarn being twisted alsobecomes heated and the resultant twisted yarn is uneven and of a poorquality. t

Furthermore, fly waste from a yarn being twisted contaminates thesurrounding air. The result is that eventually, the fly waste penetratesthe inside of the antifriction bearing. Consequently, the bearing wearsout more quickly and has a decreased working life. Also,

fly waste can accumulate on the surface of a part of the machine only tobe blown away by the disturbed air current resulting from the running ofthebelt or the rotation of the spindle. This waste can then be entangledon the surface of a yarn being twisted. The resultant yarn may then haveslubs thereon and must be'considered defective. Obviously, normaloperating conditions depend on avoiding the generation of both heat andfly waste.

The present invention isaimed at providing a new type of twistingunitwhich avoids the aforementioned objectionable features. The twistingunit of the present invention comprises a covering for the running belt,a covering for the twisting unit which is provided with a spindle, anelongated duct extending along the length of the machine frame andseveral connections between both of said coverings and said duct. Theair stream induced by the running belt and the rotation of the spindleconveys fly waste, noise and heat out of the machine and because of thisparticular arrangement of the twisting unit, the aforementioneddifficulties can be avoided, ensuring optimum operation.

Further features and advantages of the present invention will be madeclear from the following description, reference being made to theaccompanying drawings, wherein:

FIG. 1 shows a sectional view of a two-for-one type of twisting machine,

FIG. 2 shows a partial perspective view of the present assembly,

FIG. 3 shows a plane view of the connection between the main duct andthe covering of the twisting unit,

FIG. 4 shows a perspectiveview of the main duct and the covering of thetwisting. unit connected to each other,

FIG. 5 shows a sectional plane view of the main duct,

FIG. 6 shows a perspective view of the'covering of twisting unit and itscover,

FIG. 7 shows a perspective view of an embodiment of the covering ofatwisting unit,

FIG. 8 showsa perspective view of an embodiment of the covering of atwisting unit and a duct,

FIG. 9 shows a sectional view of an embodiment of a twisting assembly,

FIG. 10 shows a plane view of the side wall of the embodiment in FIG. 9,

FIG. 11 shows a perspective view of the side wall ofv the embodiment inFIG. 9,

FIG. 12 shows a partial sectional view of an embodiment of the twistingunit,

FIG. 13shows a sectional view of an air suction unit.

Referring to FIG. 1, a yarn Y to be twisted in a known manner, extendsfrom a package to the center hole of a spindle via a tension flyer 1 sothat a proper tension can be applied. Twist is applied to said yarn byrotation of the storage disc 2, while yarn ballooning is formed under'alappet 4. Said twisted yarn is finally wound up onto the take-up package8 driven by a roller 7, together with a feed roller 5 and a traverseguide 6. Said hollow spindle and said storage disc can be turned bypower transmission, which takes place between a running belt 9 and aspindle wharve 10. This driving power for the spindle can be transmittedfrom the belt with the assistance of a tension pulley 21. The belt 9running lengthwise along the frame is covered by a covering duct 11. Atwisting unit 12 of which there are preferably several placed on bothsides of the frame as-shown in FIGS. 1 and 4, are each provided with'aspindle and covered by a covering duct 13. A main duct 14 extendinglengthwise along the center of the frame is also provided. The main duct14, shown in FIG. 2, is made of a plastic material or two metal sheets15 and 16 of U- shape configuration, with the side portion of one sheetoverlapping the other. If the length of the main duct 14 is rathershort, and the sheets are connected to each other by butt joints, a bandsheet 17 is arranged overlapping the area of said butt joint so as tomaintain air tightness. The benefits from said main duct constructionare that they can be handled with ease in transportation, and also theycan be easily cleaned by any of the cleaning processes. Theconfiguration of the main duct 14 is such that one end of the duct isclosed and the other end is opened, thus allowing the air stream to flowthrough easily. If necessary, an air suction apparatus maybe arranged,as described hereinafter, at the open end of the main duct to increaseor to maintain air flow through the duct.

The covering duct 11 consists of a spindle rail 18, made of cold drawnaluminum or other suitable material, and a cover sheet 19 made of'aflexible sheet, such 19 may be assembled into the upper and lowergrooves 72 and 73 of the spindle rail 18 after the belt 9 is arrangedwithin the covering duct 11.

The upper wall 20 of the spindle rail 18 also constitutes the bottom ofcovering duct 13 of, as more fully described hereinafter. 'A pluralityof round openings are provided on the upper wall 20, so that a spindleassembly can be inserted into one of said openings and fixed to saidwall in a given arrangement. One end of the belt covering duct 11,through which said end belt 9 enters may be open. If desired, the belt 9can be connected to the fan duct.

Covering duct 13 covers the twisting unit 12 and is provided with arectangular side wall 22 which constitutes a part of the covering duct13. A cylindrical cavity, which contains a twisting zone 12, is placedin the side wall 22 and extends therethrough. A top cover 23 is placedover said covering duct 13. The arrangement of the plurality of sidewalls 22 is such that they are arranged in order, side by side in closerelation and are also fixed onto said upper wall 20 of the spindle rail18. One modified embodiment of the side wall 22 may have a bottom wallon which a round hole of proper diameter is provided.

As shown in FIG. 3 anair pipe 24 is connected between said main duct 14and the side wall 22, so that the cylindrical cavity inside wall 22 cancommunicate with the main duct 14. Pipe 24 is arranged with its centerline tangential to the helical air flow path, which air flow isgenerated by the rotation of the spindle 25. At the top center of thetop cover 23 in FIG. 1, a yarn outlet pipe 26 is provided, through whicha twisted yarn can be delivered to the winding unit.

As the belt 9 enters and runs within the length of said belt coveringduct 11, an air stream will be directed with it into said duct 11 fromthe open end and at the same time the storage disc 2 is turned by thebelt 9. Thus, air within said covering duct 11 will flow in thedirection indicated by arrow 27, i.e., from the cavity of the coveringduct 11 into the cylindrical cavity of said wall 22 via a space 28defined by the opening of the upper wall 20 and the outer surface of thespindle wharve 10, as well as by the upper surface of the upper wall 20and the lower surface of the storage disc 2.

Then, said air flow which flows in a helical path, is directed upward,passing through the space arranged between the inside cylindricalsurface of the side wall 22 and the outside cylindrical surface of thepot 3. By this helical flow, the air stream may convey fly waste, heat,and noise toward the inside of the main duct 14 via the air pipe 24.According to the revolutional direction rotation of the helical airstream, in addition to the closed condition of one end of the main duct14, the air stream conveying fly waste, heat and noise can be directedtoward the open end of said main duct 14.

The arrangement shown in FIG. 4 comprises a main duct 14, two beltcovering ducts 11 and the connecting ducts 75 and 74. Said duct 75connects the rear end of the main duct 14 to the rear end of one of thecovering ducts 11 in accordance with the running direction of the belt9, while the duct 74 connects the front part of the main duct 14 to therear end of other covering duct 11. As the belt 9 runs within thecovering duct 11, it is accompanied by an air stream, as mentionedvabove, and said air stream flows out from the rear end of eithercovering duct 11, so that a smooth flow occcurs within said main duct14.

Another embodiment of the main duct 14 is shown in FIG. 5 and providestwo dividing sheets 29 and 30 inside of the main duct to divide it intotwo separate ducts along a selected length of the main duct. The ductsincrease in cross section toward the downstream end of the main duct.Thus, the downstream air is smooth. Although the dividing sheets are notessential to proper operation of the invention, they are preferred. Thedividing sheets prevent opposed air streams entering the duct 14 fromtwo separate groups oftwisting units (as shown in FIG. 4) frominterfering with each other and disrupting the smoothness of air flow inthe main duct.

Other embodiments 13 for the covering duct of the twisting zone areshown in FIG. 6, FIG. 7 and FIG. 8. A covering duct 13, shown in FIG. 6,provides a groove 40 in one of its outer side surfaces and a projection41 on another outer side surface. Two such ducts 13 can be arranged sideby side in closely contacted relation, by inserting the projection 41 ofone duct into the groove 40 of the adjacent duct. It is recommended thata window 42, made of a transparent plate as shown in FIG. 7, be providedat the bottom part of said covering duct 13. The provision of saidwindow will enable easy inspection of the helical yarn path, startingfrom the edge of the storage disc 2.

As shown in FIG. 6, a top cover 23 consists of a square plate 43 with acircular center opening, a hemispherical plate 44 and a yarn outlet pipe26 at the top of hemispherical plate 44. Above the top surface of wall22, there is provided a guide plate 46 which has a T-shaped projection45. When two edges of said square plate 43 are slidably inserted intothe guide ways of the -shaped projections 45 of two adjacent guideplates, the top cover 23 can be easily placed in proper position on thetop surface of the side wall 22. The guide plate 46 can be convenientlymounted to the top of the side wall 22 by welding, or, more preferably,guide plate 46 can be mounted to the wall 22 by the provision of spring48 arranged between the guide plate 46 and a stud 47 mounted on the sidewall 22. By this latter arrangement, the guide plate 46 may be urgedonto the top surface of the side wall 22 by a spring force. In theembodiment of FIG. 8, the square plate 43 may be mounted onto the sidewall 22 by providing a hinge 49 between them. Mounting the square plate46 onto the side wall 22 by means of either method described above makesreplacing the yarn package or mending broken yarn a rather simpleprocedure. The configuration of the hemispherical plate 44 on the squareplate 43 is such that it does not interfere with ballooned yarn.

In FIG. 9, another embodiment of the covering duct 13 for the twistingzone is shown. The side wall 22 of this embodiment has a concave surface31 which gently tapers off at the bottom of the inside cylindricalsurface. Said inside cylindrical surface has a tapered surface 32, thediameter of which is larger at the uppermost portion than that at thelowermost portion as viewed in FIG. 9. The configuration of the sidewall 22 is such that, in cross section itis round, but its upper part iscut off by an inclined plane 34. An air opening 24 (air pipe) isprovided in the upper portion of the side wall 22 and connects thetwisting zone to the main duct 14, the air opening 24 is situated in theside wall 22 at a position far from that portion of the surface of saidside wall 22, which a ballooned yarn touches. To cover the top part of atwisting unit 12, as shown in FIG. 9, a top cover 23 is provided on theinclined plane 34. The top cover 23 can be pivoted to the dotted lineposition shown in FIG. 9 because of the pivotal connection to side wall22 by means of pin 36. When this cover is moved aside, replacement of ayarn package or repair of a broken yarn may be effected as indicated bythe two dot bar line in FIG. 9. The yarn outlet pipe 26 can be securedto the top cover 23 by means of an O- ring 37, thus making is possibleto vary the height of said yarn outlet pipe 26 relative to the cover 23,in order to control the height of the ballooned yarn, and consequently,to control the balloon tension for a twisted yarn.

An air stream 38, induced by the rotation of the storage disc 2, isdirected smoothly upward after flowing along the concave surface 31, andcontinues to flow upward in a helical path. In this case, the helicalturning direction of the air 39 is the same as the rotation of thestorage disc 2. The upward flowing speed of the air 39 has more forcebecause of the tapered surface configuration 32 of the cavity. When theair flow finally enters the under surface 33 of the top cover 23,it isthen delivered into the main duct 14 via the opening 24.

In FIG. 12, another embodiment of the belt covering duct 11 is shown.The front opening 53 of the spindle rail 18 is covered by means of apivotable cover 50. A U-shaped hook 51 is attached to the underside ofsaid cover 50, and can be pivoted freely around the bent bar 52. By thisconnection, said cover 50' can be moved away from the opening 53. Amagnet 54 extending lengthwise, is covered by rubber and glued to thetop of the cover 50. The attractive force of said magnet to the metalupper wall will close the opening by holding said cover 50 against theangled portion of the upper wall 20, as shown in FIG. 12.

Cover 50 is a plate made of molded, transparent plastic. Therefore, whensaid cover 50 is placed over the opening 53, the inside of 'the duct isstill visible.

Through this transparent cover 50, one can easily inspect the yarn anglestorage from the edge of the starling disc, as well as the runningcondition of the belt 9 and the pulley 21. Furthermore, repairsinvolving elements or operation can be effected by a worker with ease.

FIG. 13 shows an embodiment of the air suction apparatus arranged at theend of the twisting frame.

The downstream end of the main duct 14 is attached to the front end ofthe dust collecting dust 56 of the air suction unit 55, and at the rearend of said duct a filter 76 is provided. An air suction apparatus 58 isassembled within the cavity of the air chamber 57, and by means ofsuction force generated by said air suction apparatus 58, an air streamconveying dust can flo'w in the direction of the arrows. An air guideplate 58' is provided with a sound proof material 59, made of a softmaterial such as felt or sponge. This sound proof agent 59 acts to lowerthe noise carried by said air stream it passes through said apparatus58. Between the filter 76, which forms a wall of the air chamber 57, andthe door 60, which is arranged outside of the frame end, iswaste-collecting chamber 61. Dust particles, unable to pass throughwhich the filter, accumulate on the floor of said chamber 61. Thisaccumulated waste 62 can be removed from said waste collecting chamber61, by opening said door 60. A division wall63 is also arranged withinsaid air chamber 57, and it separates apulley chamber 64 from the mainpart of said air chamher 57. Within said pulley chamber 64, a followerpulley assembly 65 is provided, from which a driving force can betransmitted to each twisting unit via belt 9 which runs-through theopening 66 provided in the wall of the pulley chamber 64.

When the air suction apparatus 58 is operated, the air stream within themain duct 14 can be directed as the arrows indicate in FIG. 13, and saidstream with wastes passes through the filter 76 via dust collecting duct56 and waste collecting chamber 61. The air filter 76 cleans the airstream by filtering the wastes and only clean air enters the undergroundpit via a delivery duct 67. Circulation and filtering of the air takeplace as long as the frame is running. The waste 62 accumulated in thewaste collecting chamber 61 can be removed by a cleaner. A gear box 68,which contains a gear train for driving a driving shaft 69 and also atraverse rod 70, are situated above the .end of the main duct 14 and theair chamber 57.

A stopping rod 71, as shown in FIG. 1, is movably assembled in the holeof the top cover 23, so as to drop and project from the top cover 23when yarn breakage occurs. When said stopping rod 71 drops into the topcover 23, said rod acts to stop the rotational movement of theballooning yarn.

What is claimed is:

1. A twisting frame provided with a plurality of twisting spindles, eachof said spindles being driven by a tangential belt running along thelength of the frame, wherein a duct assembly comrises a belt coveringduct (11), which covers said tangential belt;

a plurality of twisting units;

a twisting zone covering duct (13) for each said twisting unit, saidtwisting units each being provided with a twisting spindle;

a main duct (14) mounted on and extending along the whole length of theframe;

first means for connecting said belt covering duct to said twisting unitcovering duct of the twisting zone; and second means for connecting saidtwisting zone covering ducts to said main duct.

2. A twisting frame as claimed in claim 1, further comprising means forconnecting an end of said belt covering duct, to said main duct.

3. A twisting frame as claimed in claim 1, wherein said belt coveringduct and said twisting unit covering duct having a common wall, andwherein said means for connecting said belt covering duct and saidtwisting unit covering duct comprises an opening (28) in the common wallof the'said two covering ducts.

4. A twisting frame as claimed in claim 1, wherein said means forconnecting said twisting unit covering duct and said main duct is an airpipe (24), the center line of whichis arranged parallel to a linetangential to a helical flow path of air flowing within said twistingunit covering duct. v

5. A twisting frame as claimed in claim 1, wherein said twisting unitcovering duct has a tapered cylindrical cavity (32), the diameter of theupper part of said tapered cylindrical cavity being larger than that ofthe lower part, the bottommost part of said cylindrical cavity forming aconcave surface.

6. A twisting frame as claimed in claim 1, wherein the outer surface. ofeach of said twisting unit covering ducts is square, a projection (41)is provided on one side of said square, and on the opposite side of the8. A twisting frame as defined in claim 1, wherein an air suctionapparatus is provided, said air suction appar ratus comprising acollecting duct (56) and a filter (76), said filter being mounted insaid collecting duct, said air suction apparatus being connected to theair outlet end of said main duct.

UNITED STATES PATENT OFFICE CERTIFICATE CORRECTION Patent No. 3,857,228Dated December 31, 1974 Inventor) Teiji Nakahara et a1.

It is certified that error appears in the above-identified patent andthat said Letters Patent are hereby corrected as shown below:

In the Abstract of the Disclosure, line 2: after "running" add --belt a-Column 5, line 40: change "storage" to --starting-.

change "star-" to -storage-.

line 412 delete "ling".

line 50: change "76'" to --76--.'

the address of one of the inventors has been misspelled, that is,"Nagoakakyo" should read Nagaokakyo Signed and sealed this 17th day ofJune 1975.

(SEAL) Attest:

C. MARSHALL DANE RUTH C. HA ON Commissioner of Patents 0 Q AttestingOfficer and Trademarks FORM PO-OSO (1049) UCOMWDC 37ml,

I u s sovnunn mums amt! nu o-au-au

1. A twisting frame provided with a plurality of twisting spindles, eachof said spindles being driven by a tangential belt running along thelength of the frame, wherein a duct assembly comrises a belt coVeringduct (11), which covers said tangential belt; a plurality of twistingunits; a twisting zone covering duct (13) for each said twisting unit,said twisting units each being provided with a twisting spindle; a mainduct (14) mounted on and extending along the whole length of the frame;first means for connecting said belt covering duct to said twisting unitcovering duct of the twisting zone; and second means for connecting saidtwisting zone covering ducts to said main duct.
 2. A twisting frame asclaimed in claim 1, further comprising means for connecting an end ofsaid belt covering duct, to said main duct.
 3. A twisting frame asclaimed in claim 1, wherein said belt covering duct and said twistingunit covering duct having a common wall, and wherein said means forconnecting said belt covering duct and said twisting unit covering ductcomprises an opening (28) in the common wall of the said two coveringducts.
 4. A twisting frame as claimed in claim 1, wherein said means forconnecting said twisting unit covering duct and said main duct is an airpipe (24), the center line of which is arranged parallel to a linetangential to a helical flow path of air flowing within said twistingunit covering duct.
 5. A twisting frame as claimed in claim 1, whereinsaid twisting unit covering duct has a tapered cylindrical cavity (32),the diameter of the upper part of said tapered cylindrical cavity beinglarger than that of the lower part, the bottommost part of saidcylindrical cavity forming a concave surface.
 6. A twisting frame asclaimed in claim 1, wherein the outer surface of each of said twistingunit covering ducts is square, a projection (41) is provided on one sideof said square, and on the opposite side of the square a groove (40) isprovided for accepting the projection of an adjacent twisting unitcovering duct.
 7. A twisting frame as defined in claim 1, wherein theinside of said main duct is provided with two dividing sheets (29, 30),the space between the said dividing sheets being wider at their upstreamportions than at their downstream portions.
 8. A twisting frame asdefined in claim 1, wherein an air suction apparatus is provided, saidair suction apparatus comprising a collecting duct (56) and a filter(76), said filter being mounted in said collecting duct, said airsuction apparatus being connected to the air outlet end of said mainduct.